williams



(No Model.)

J. A. WILLIAMS.- BUGKSAW.

No. 568,137. Patented Apr. 14,1896.

UNITED "STATES 1 PATENT OFFICE...

JOHN A. WVILLIAMS, OF HELENA, MONTANA, ASSIGNOR OF SEVEN-EIGHTHS TOTHOS. F. WILLIAMS, CHARLES M. WILLIAMS, AUGUST WIESENI-IORN,

EPIIRAIM OLESON, AND HENRY ASMUSSEN, OF SAMEPLACE.

BUCKSAW.

SPECIFICATION forming part of Letters Patent No. 558,137, dated April14, 1896. Application filed January 21, 1896. Serial No. 576,357. (Nomodel.)

To aZZ whom it may concern.-

Be it known that I, JOHN A. WILLIAMS, a citizen of the United States,residing at I-lel ena, in the county of Lewis and Clarke and 5 State ofMontana, have invented certain new and useful Improvements in Bucksaws,of which the following is a specification, reference being had thereinto the accompanying drawings.

In the drawings, Figure l is a side elevation of the saw with the bladeunder tension ready for use; Fig. 2, a similar View with the bladeloosened and the spring-frame relaxed; Fig. 3, an edge view of Fig. 1;Fig. 4C, a detail plan of the handle and tension-lever; Fig. 5, a detailsection taken on the line 5 5 of Fig. 1; Fig. 6, a detail view showing amodified form of the tension-lever.

This invention relates to bucksaws and crosscut-saws, and its object isto improve the construction and render it cheaper and stronger andlighter, as more fully hereinafter set forth.

The frame is formed of a single piece of 2 5 thin spring-steel bent toform the back portion a and the two end portions Z) Z), the back portionbeing curved slightly downward to give the required elasticity and theend portions inclining downward and outward but in 0 the same verticalplane. The frame is formed of a fiat bar provided along the center ofits inner or under side with a continuous rib or flange 0, giving to theframe-bar a substantially T shape in cross-section. An adjustable 3 5handle cl is attached to the upper part of the end bar I), this handlebeing provided with a clip cl, which embraces the side edges of the barbut does not touch the central rib c, and which is provided with aset-screw d to en- 40 able it to be fastened at any desired point alongthe bar. The saw-blade e is pivoted at its outer end to an ear or ears6, secured to the lower end of the end bar I), and at its other end ispivoted between the upper bifurcated ends of a tension-lever), thistension-lever being pivoted at f to an extension of the fiat rib c andbeing provided with a handle f at its lower end below the lower end ofthe bar I). The upper end of this tension-lever is curved inwardly at f,where it connects with the end of the saw-blade. The rib c of the bar I)fits nicely between the bifurcated parts of the tension-lever and thelever is lockedin place while the saw is under tension by means of asmall pin g, which is passed through suitable 5 5 registering holes inthe lever and the em-' braced portion of the extended rib, the leverwhen locked in posit-ion being approximately in line with the end barI). It will be observed that to put the saw under tension ready for useit is simply necessary to spring the end bars closer together and passthe locking-pin 9 through the registering. holes. The curvature in theback portion (L partially straightens out and gives the necessarytension to the blade. The main feature is the central inwardly-extendingrib on the frame-bar, which is located in perfect alinement with thesaW-blademhereby all torsional strain on the blade and all tendency tosidewise deflection is avoided, and whereby the frame may be made muchstronger with the same weight of material. Bifurcating the tension-leverand pivoting it on the central rib brings the tension-line of thesaw-blade directly in line with the central rib of the frame and makesthe pull direct and positive.

As shown in Fig. 6, the tension-lever may be made in the form of acurved bar f pivoted to the end bar Z7 at a point above the sawblade andextending upwardly alongside the end bar b,this form of tension-leverbeing preferably locked to the end bar I) by means of a sliding loop fIn this instance a stationary handle it it may be secured at the respec-8 5 tive ends of the end bar 19.

Having thus fully described my invention, what I claim is-- In acrosscut or buck saw, the combination, of a frame constructed of asingle bar of sprin gsteel bent to form the back portion and the two endbars, said frame-bar being provided with an integral longitudinal ribprojecting centrally from its under or inner side, a saw blade pivotedat one end to one of the end bars In testimony whereof I affix mysignature and lying in direct alinement with said rib, a in presence oftwo Witnesses. tension-lever f pivoted to the rib 0f the other end barand to the adjacent end of the saw- JOHN A. WILLIAMS. 5 blade and beingbifurcated to embrace said Vitnesses:

parts, and being provided With a handle and T. W. BURKE,

locking means, substantially as described. H. O. STERLING.

